The Paton Welding Journal, 2020, №11



2020 №11 (01)

DOI of Article 10.37434/tpwj2020.11.02

2020 №11 (03)

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The Paton Welding Journal, 2020, #11, 8-11 pages

The nature of nonmetallic inclusion distribution in the weld metal structural components at arc welding methods

V.V. Holovko

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Abstract
With the purpose of expert evaluation of welded joint performance a large number of computer programs have been developed now for prediction of the weld metal structural composition and their mechanical properties. Such programs are usually based on multivariate analysis of the processes occurring in the welding arc, and thermodynamics and kinetics of the processes in the weld pool. It should be noted that at analysis of crystallization and recrystallization reactions in the weld metal, such programs usually do not take into account the nature of nonmetallic inclusion distribution in the structural components. There are many studies, which point to a significant impact of the inclusion, depending on whether they are present on the boundaries or in the body of the grains. The paper shows the need to take into account the probability of nonmetallic inclusions being in the body of structure grains or on their boundaries at construction of the numerical models that will allow improving the correspondence of the predicted data and the experimental results of determination of the mechanical characteristics of weld metal. 5 Ref., 5 Figures.
Keywords: metals science, low-alloy steels, welds, microstructure, numerical modeling, nonmetallic inclusions

Received 19.10.2020

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